KR20200015556A - QCL indication by UE-beam based tagging - Google Patents

Abstract

The UE may receive an indication of a beam pair link (BPL), where the BPL includes a base station (BS) transmit beam and a corresponding UE receive beam. The UE may tag the BPL based on the UE receive beam. The UE may take one or more actions associated with the tagged BPL.

Description

QCL indication by UE-beam based tagging

Cross Reference to Related Applications

This application supersedes U.S. Application No. 16 / 009,034, filed Jun. 14, 2018, which claims the benefit and priority of U.S. Application No. 62 / 521,308, filed June 16, 2017. All of which are hereby incorporated by reference in their entirety.

Introduction

Aspects of the present disclosure relate to wireless communication, and more particularly, to quasi co-location (QCL) based on UE beam tagging.

Wireless communication systems are widely deployed to provide various telecommunication services, such as telephone, video, data, messaging, and broadcasts. Conventional wireless communication systems may employ multiple-access techniques capable of supporting communication with multiple users by sharing the available system resources (eg, bandwidth, transmit power). Examples of such multiple access techniques are code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single- Carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.

In some examples, a wireless multi-access communication system may include a number of base stations, each of which simultaneously supports communication for multiple communication devices, otherwise known as user equipments (UEs). In a Long-Term Evolution (LTE) or LTE-Advanced (LTE-A) network, a set of one or more base stations may define an eNodeB (eNB). In other examples (eg, in a next generation or 5G network), a wireless multiple access communication system may comprise a number of central units (CUs) (eg, central nodes (CNs), access node controllers (ANCs) Multiple distributed units (DUs) (eg, edge units (EUs), edge nodes (ENs), radio heads (RHs), smart radio heads (SRH)) , Transmission receiving points (TRPs, etc.), wherein the set of one or more distributed units in communication with the central unit may include an access node (eg, a new radio base station (NR BS), NR NB). (new radio node-B), network node, 5G NB, gNB, etc.) may be defined. The base station or DU may communicate with a set of UEs on downlink channels (eg, for transmissions from the base station to the UE) and uplink channels (eg, for transmissions from the UE to the base station or distributed unit). It may be.

These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at the municipal, national, local, and even global levels. An example of emerging telecommunication standards is new radio (NR), for example 5G radio access. NR is a set of enhancements to the LTE mobile standard published by the Third Generation Partnership Project (3GPP). This not only supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation, but also improves spectral efficiency, lowers costs, improves services, uses new spectrum, and It is designed to better support mobile broadband Internet access by better integrating with other open standards using OFDMA with cyclic prefix (CP) on the downlink (DL) and on the uplink (UL).

However, as the demand for mobile broadband access continues to increase, there is a need for further improvements in NR technology. Preferably, these improvements should be applicable to other multiple access technologies and telecommunication standards employing these technologies.

summary

As described herein, certain wireless systems may employ directional beams for transmission and reception.

Certain aspects of the present disclosure provide a method for wireless communication that may be performed by, for example, a UE. The method includes receiving an indication of a beam pair link (BPL), wherein the BPL includes a base station (BS) transmission beam and a corresponding UE receive beam. Receiving an indication, tagging a BPL based on the UE receive beam, and taking one or more actions associated with the tagged BPL.

Certain aspects of the present disclosure provide a method for wireless communication that may be performed by, for example, a BS. The method includes transmitting an indication of a beam pair link (BPL), wherein the BPL includes a BS transmit beam and a corresponding user equipment (UE) receive beam. Transmitting a message, receiving an indication of a tag assigned to a BPL based on the UE receive beam, and taking one or more actions associated with the tagged BPL.

Certain aspects of the present disclosure provide an apparatus for wireless communication, which may be performed by, for example, a UE. The apparatus, means for receiving an indication of a beam pair link (BPL), wherein the BPL comprises a base station (BS) transmit beam and a corresponding UE receive beam, means for receiving an indication of the BPL, based on a UE receive beam Means for tagging the BPL, and means for taking one or more actions associated with the tagged BPL.

Certain aspects of the present disclosure provide an apparatus for wireless communication, which may be performed by, for example, a BS. The apparatus is a means for transmitting an indication of a beam pair link (BPL), wherein the BPL transmits an indication of the beam pair link (BPL), including a BS transmit beam and a corresponding user equipment (UE) receive beam. Means, means for receiving an indication of a tag assigned to a BPL based on the UE receive beam, and means for taking one or more actions associated with the tagged BPL.

Certain aspects of the present disclosure provide an apparatus for wireless communication, which may be performed by, for example, a UE. The apparatus includes at least one processor and a memory coupled to the at least one processor. The at least one processor is configured to receive an indication of a beam pair link (BPL), wherein the BPL is configured to receive an indication of the BPL, including a base station (BS) transmission beam and a corresponding UE receive beam, and the UE Tag the BPL based on the received beam, and take one or more actions associated with the tagged BPL.

Certain aspects of the present disclosure provide an apparatus for wireless communication, which may be performed by, for example, a BS. The apparatus includes at least one processor and a memory coupled to the at least one processor. The apparatus transmits an indication of a beam pair link (BPL), wherein the BPL transmits an indication of the beam pair link (BPL), including a BS transmit beam and a corresponding user equipment (UE) receive beam. And receive an indication of a tag assigned to the BPL based on the UE receive beam, and take one or more actions associated with the tagged BPL.

Certain aspects of the present disclosure provide a computer readable medium storing computer executable instructions, the instructions causing a UE to receive an indication of a beam pair link (BPL), where the BPL transmits a base station (BS) Receive an indication of the BPL, including a beam and a corresponding UE receive beam, tag the BPL based on the UE receive beam, and take one or more actions associated with the tagged BPL.

Certain aspects of the present disclosure provide a computer readable medium storing computer executable instructions, the instructions causing a BS to transmit an indication of a beam pair link (BPL), where the BPL is a BS transmit beam and a corresponding one. Transmit an indication of the beam pair link (BPL), including a user equipment (UE) receive beam, to receive an indication of a tag assigned to the BPL based on the UE receive beam, and tagging Take one or more actions associated with the BPL.

Aspects generally include methods, apparatus, systems, computer readable media, and processing systems as substantially described herein with reference to the accompanying drawings and as illustrated by the accompanying drawings.

Other aspects, features, and embodiments of the invention will become apparent to those skilled in the art upon reviewing the following description of certain illustrative embodiments of the invention in conjunction with the accompanying drawings. While features of the invention may be discussed with respect to the specific embodiments and figures below, all embodiments of the invention may include one or more of the advantageous features discussed herein. That is, although one or more embodiments may be discussed as having particular advantageous features, one or more of such features may also be used in accordance with various embodiments of the invention discussed herein. In a similar manner, although example embodiments may be discussed below as device, system, or method embodiments, it should be understood that such example embodiments may be implemented in various devices, systems, and methods. .

1 is a block diagram conceptually illustrating an example telecommunications system in accordance with certain aspects of the present disclosure.
2 is a block diagram illustrating a logical architecture of an example distributed RAN in accordance with certain aspects of the present disclosure.
3 is a diagram illustrating a physical architecture of an example distributed RAN in accordance with certain aspects of the present disclosure.
4 is a block diagram conceptually illustrating a design of an example BS and a UE in accordance with certain aspects of the present disclosure.
5 is a diagram illustrating examples for implementing a communication protocol stack in accordance with certain aspects of the present disclosure.
6 illustrates an example of a frame format for a new radio (NR) system, in accordance with certain aspects of the present disclosure.
7 shows an example of the P1, P2, and P3 procedures.
8 illustrates an example of updated BPL tags after discovery and deletion, in accordance with certain aspects of the present disclosure.
9 illustrates an example of BPL tags after P2, in accordance with certain aspects of the present disclosure.
10 illustrates an example of updated BPL tags after P3, in accordance with certain aspects of the present disclosure.
11 illustrates example operations performed by a UE, in accordance with aspects of the present disclosure.
12 illustrates example operations performed by a BS, in accordance with aspects of the present disclosure.
13 illustrates a communications device that may include various components configured to perform operations for the techniques disclosed herein in accordance with aspects of the present disclosure.
14 illustrates a communication device that may include various components configured to perform operations for the techniques disclosed herein in accordance with aspects of the present disclosure.
For ease of understanding, the same reference numerals have been used, where possible, to designate the same elements that are common to the figures. It is contemplated that elements disclosed in one aspect may be beneficially utilized in other aspects without specific citation.

details

Aspects of the present disclosure provide apparatuses, methods, processing systems and computer readable media for new radio (NR) (new radio access technology or 5G technology).

NR targets eMBB (enhanced mobile broadband), which targets wide bandwidths (eg, 80 MHz and above), millimeter wave (mmW), and non-compatibility MTC technologies that target high carrier frequencies (eg, 60 GHz). May support various wireless communication services such as Massive MTC (mMTC), and / or mission critical targeting ultra-reliable low latency communication (URLLC). Such services may include latency and reliability requirements. These services may also have different transmission time intervals (TTI) to meet individual quality of service (QoS) requirements. In addition, these services may coexist in the same subframe.

mmW communication brings gigabit speed to cellular networks due to the availability of large amounts of bandwidth. The inherent challenges of heavy path-losses faced by millimeter-wave systems require new techniques such as hybrid beamforming (analog and digital) that do not exist in 3G and 4G systems. Hybrid beamforming may improve the link budget / signal-to-noise ratio (SNR) that may be used during the RACH.

Spectrum bands at high frequencies (eg, 28 GHz, may be referred to as mmW (or mmWave)) allow for large bandwidth capable of delivering multi-Gbps data rates, and extremely dense spatial reuse that may increase capacity. to provide. Conventionally, these higher frequencies have not been sufficiently robust for indoor / outdoor mobile broadband applications due to high propagation loss and sensitivity to blocking (eg, from buildings, people, etc.).

Despite these challenges, at higher frequencies at which mmW operates, small wavelengths enable a large number of antenna elements in a relatively small form factor. Unlike microwave links, which may cast very wide footprints, reducing the achievable amount of reuse of the same spectrum within a geographic area, mmW links cast very narrow beams (eg, beams may have narrow angles). May be). This property of mmWave may be leveraged to form directional beams that may transmit and receive more energy to overcome propagation and path loss challenges.

These narrow directional beams can also be utilized for spatial reuse. This is one of the major success factors for using mmW for mobile broadband services. In addition, non-line-of-site (NLOS) paths (eg, reflections from nearby buildings) can have very large energies, thus providing alternative paths when line-of-site paths are blocked. do.

With more antenna elements and narrow beams, in an effort to maximize the signal energy received at the UE, it has become increasingly important to transmit signals in the proper direction.

The following description provides examples and does not limit the scope, applicability, or examples set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. By way of example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Also, features described with respect to some examples may be combined in some other examples. For example, an apparatus may be implemented or a method may be practiced using any number of aspects set forth herein. In addition, the scope of the present disclosure is intended to cover such an apparatus or method which is practiced using other structure, functionality, or structure and functionality in addition to or in addition to the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more components of a claim. The word "exemplary" is used herein to mean "acting as an example, illustration, or illustration." Any aspect described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other aspects.

The techniques described herein may be used for various wireless communication networks such as LTE, CDMA, TDMA, FDMA, OFDMA, SC-FDMA, and other networks. The terms "network" and "system" are often used interchangeably. CDMA networks may implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, and the like. UTRA includes wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers IS-2000, IS-95 and IS-856 standards. The TDMA network may implement a radio technology such as Global System for Mobile Communications (GSM). OFDMA networks include NR (e.g., 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, etc. The same wireless technology may be implemented. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). NR is an emerging wireless communication technology being developed with the 5G Technology Forum (5GTF). 3GPP Long Term Evolution (LTE) and LTE-Advanced (LTE-A) are releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization named "3rd Generation Partnership Project (3GPP)". cdma2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2 (3GPP2)". The techniques described herein may be used for the wireless networks and radio technologies mentioned above as well as other wireless networks and radio technologies. For clarity, aspects may be described herein using terms commonly associated with 3G and / or 4G wireless technology, but aspects of the present disclosure include other generations, such as 5G and later, including NR technologies. It can be applied to the base communication system.

Example Wireless Communication System

1 illustrates an example wireless network 100 in which aspects of the present disclosure may be practiced. According to an example, the wireless network may be an NR or 5G network that may support mmW communication. mmW communication relies on beamforming to meet the link margin. mmW communication may use directional beamforming, so the transmission of signaling is directional. Accordingly, the transmitter may focus the transmission energy in a predetermined narrow direction as illustrated in FIG. 7 (eg, the beams may have a narrow angle). The receiving entity may use receiver beamforming to receive the transmitted signaling.

UEs 120 may be configured to perform the operations 1100 and methods described herein for UE beam-based tagging. BS 110 may include a transmit / receive point (TRP), a Node B (NB), a 5G NB, an access point (AP), a new radio (NR) BS, a master BS, a primary BS, and the like. The NR network 100 may include a central unit. The BS may be configured to perform the operations 1200 and methods described herein for UE beam-based tagging.

As illustrated in FIG. 1, the wireless network 100 may include a number of base stations (BSs) 110 and other network entities. The BS may be a station in communication with user equipments (UEs). Each BS 110 may provide communication coverage for a particular geographic area. In 3GPP, the term “cell” may refer to the coverage area of Node B (NB) and / or the Node B subsystem serving this coverage area, depending on the context in which the term is used. In NR systems, the term “cell” and next-generation NodeB (gNB), new radio base station (NR BS), 5G NB, access point (AP), or transmit / receive point (TRP) may be interchangeable. In some examples, the cell does not necessarily need to be static, and the geographic area of the cell may move according to the location of the mobile BS. In some examples, the base stations may use any suitable transport network, and one or more other base stations or network nodes in the wireless communication network 100 via various types of backhaul interfaces, such as direct physical connection, wireless connection, virtual network, and the like. (Not shown) and / or interconnected with each other.

In general, any number of wireless networks may be deployed in a given geographical area. Each wireless network may support a specific radio access technology (RAT) and may operate on one or more frequencies. RAT may also be referred to as radio technology, air interface, or the like. The frequency may also be referred to as carrier, subcarrier, frequency channel, tone, subband, and the like. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

A base station (BS) may provide communication coverage for macro cell, pico cell, femto cell, and / or other types of cells. The macro cell may cover a relatively large geographic area (eg, several kilometers in radius) and may allow unlimited access by UEs with service subscriptions. The pico cell may cover a relatively small geographic area and may allow unlimited access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (eg, home) and have UEs associated with the femto cell (eg, UEs in a closed subscriber group (CSG), users at home). Limited access by UEs, etc.). The BS for the macro cell may be referred to as a macro BS. The BS for the pico cell may be referred to as a pico BS. The BS for the femto cell may be referred to as a femto BS or a home BS. In the example shown in FIG. 1, the BSs 110a, 110b, and 110c may be macro BSs for the macro cells 102a, 102b, and 102c, respectively. BS 110x may be a pico BS for pico cell 102x. BSs 110y and 110z may be femto BSs for femto cells 102y and 102z, respectively. The BS may support one or multiple (eg, three) cells.

The wireless communications network 100 may also include relay stations. The relay station receives a transmission of data and / or other information from an upstream station (eg, BS or UE) and sends a transmission of data and / or other information to a downstream station (eg, UE or BS). The transmitting station. The relay station may also be a UE relaying transmissions to other UEs. In the example shown in FIG. 1, the relay station 110r may communicate with the BS 110a and the UE 120r to enable communication between the BS 110a and the UE 120r. The relay station may also be referred to as a relay BS, a relay, and the like.

Wireless network 100 may be a heterogeneous network including different types of BSs, eg, macro BS, pico BS, femto BS, repeater, and the like. These different types of BSs may have different effects on different transmission power levels, different coverage areas and interference in the wireless network 100. For example, the macro BS may have a high transmit power level (eg, 20 Watts), while the pico BS, femto BS, and repeaters may have a lower transmit power level (eg, 1 Watt). have.

The wireless communications network 100 may support synchronous or asynchronous operation. For synchronous operation, the BSs may have similar frame timing, and transmissions from different BSs may be approximately aligned in time. For asynchronous operation, the BSs may have different frame timings, and transmissions from different BSs may not be aligned in time. The techniques described herein may be used for both synchronous and asynchronous operation.

Network controller 130 may couple to a set of BSs and provide coordination and control for these BSs. Network controller 130 may communicate with BSs 110 via a backhaul. The BSs 110 may also communicate with each other, eg, directly or indirectly via wireless or wired backhaul.

UEs 120 (eg, 120x, 120y, etc.) may be distributed throughout wireless network 100, and each UE may be stationary or mobile. The UE may also be a mobile station, terminal, access terminal, subscriber unit, station, customer premises equipment (CPE), cellular phone, smartphone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, Cordless phones, wireless local loop (WLL) stations, tablet computers, cameras, gaming devices, netbooks, smartbooks, ultrabooks, appliances, medical devices or medical equipment, biometric sensors / devices, smart watches, smart clothing, smart glasses, Wearable devices such as smart wristbands, smart jewelry (eg, smart rings, smart bracelets, etc.), entertainment devices (eg, music devices, video devices, satellite radios, etc.), vehicle components or sensors, smart meters / sensors , Industrial manufacturing equipment, global positioning system devices, or wireless or wired media Is configured to communicate via may also be referred to as any other suitable device. Some UEs may be considered machine type communication (MTC) devices or evolved MTC (eMTC) devices. MTC and eMTC UEs may be, for example, robots, drones, remote devices, sensors, meters, monitors that may communicate with a BS, another device (eg, a remote device), or some other entity. , Location tags, and the like. A wireless node may provide connectivity to or into a network (eg, a wide area network such as the Internet or a cellular network) via, for example, a wired or wireless communication link. Some UEs may be considered Internet-of-Things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.

Certain wireless networks (eg, LTE) utilize orthogonal frequency division multiplexing (OFDM) on the downlink and single-carrier frequency division multiplexing (SC-FDM) on the uplink. OFDM and SC-FDM partition the system bandwidth into multiple (K) orthogonal subcarriers, also commonly referred to as tones, bins, and the like. Each subcarrier may be modulated with data. In general, modulation symbols are sent in the frequency domain with OFDM and in the time domain with SC-FDMA. The spacing between adjacent subcarriers may be fixed and the total number K of subcarriers may depend on the system bandwidth. For example, the spacing of subcarriers may be 15 kHz, and the minimum resource allocation (referred to as a "resource block" (RB)) may be 12 subcarriers (or 180 kHz). As a result, the nominal fast Fourier transform (FFT) size may be equal to 128, 256, 512, 1024 or 2048 for system bandwidth of 1.25, 2.5, 5, 10 or 20 megahertz (MHz), respectively. System bandwidth may also be partitioned into subbands. For example, the subband may cover 1.08 MHz (ie six resource blocks), and 1, 2, 4, 8 or 16, respectively, for system bandwidth of 1.25, 2.5, 5, 10 or 20 MHz. Subbands may be present.

Although aspects of the examples described herein may be associated with LTE technologies, aspects of the present disclosure may be applicable to other wireless communication systems such as NR. NR may utilize support with CP on the uplink and downlink and include support for half-duplex operation using TDD. Beamforming may be supported and the beam direction may be dynamically configured. MIMO transmissions with precoding may also be supported. MIMO configurations in the DL may support up to eight transmit antennas, with up to eight streams and up to two streams of DL per UE. Multi-layer transmissions up to two streams per UE may be supported. Aggregation of multiple cells may be supported up to eight serving cells.

In some examples, access to the air interface may be scheduled, where a scheduling entity (eg, base station) allocates resources for communication between some or all devices and equipment in its service area or cell. The scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communication, dependent entities utilize the resources allocated by the scheduling entity. Base stations are not the only entities that may function as scheduling entities. In some examples, the UE may function as a scheduling entity, may schedule resources for one or more dependent entities (eg, one or more other UEs), and other UEs may be resources scheduled by the UE for wireless communication You can also use them. In some examples, the UE may function as a scheduling entity in a peer-to-peer (P2P) network and / or in a mesh network. In the mesh network example, UEs may communicate directly with each other in addition to communicating with a scheduling entity.

In FIG. 1, the solid line with both arrows indicates the desired transmission between the UE and the serving BS, which is the BS designated to serve the UE on the downlink and / or uplink. Fine dashed lines with double arrows indicate interfering transmissions between the UE and BS.

FIG. 2 illustrates an example logical architecture of a distributed radio access network (RAN) 200 that may be implemented in the wireless communication network 100 illustrated in FIG. 1. The 5G access node 206 may include an access node controller (ANC) 202. ANC 202 may be a central unit (CU) of distributed RAN 200. The backhaul interface to the next generation core network (NG-CN) 204 may be terminated at the ANC 202. The backhaul interface to neighboring next generation access nodes (NG-ANs) 210 may be terminated at ANC 202. The ANC 202 may include one or more transmit / receive points (TRPs) 208 (eg, cells, BSs, gNBs, etc.).

The TRPs 208 may be a distributed unit (DU). The TRPs 208 may be connected to a single ANC (eg, ANC 202) or more than one ANC (not shown). For example, for RAN sharing, radio as a service (RaaS), and service specific AND deployments, TRPs 208 may be connected to more than one ANC. The TRPs 208 may each include one or more antenna ports. The TRPs 208 may be configured to serve traffic to the UE individually (eg, dynamic selection) or jointly (eg, joint transmission).

The logical architecture of the distributed RAN 200 may support fronthauling solutions across different deployment types. For example, the logical architecture may be based on transmission network capabilities (eg, bandwidth, latency, and / or jitter).

The logical architecture of the distributed RAN 200 may share features and / or components with LTE. For example, next generation access node (NG-AN) 210 may support dual connectivity with NR, and may share a common fronthaul for LTE and NR.

The logical architecture of the distributed RAN 200 may enable collaboration between and among the TRPs 208, for example, within the TRP and / or across the TRPs via the ANC 202. The inter-TRP interface may not be used.

Logical functions in the logical architecture of distributed RAN 200 may be dynamically distributed. As will be described in more detail with reference to FIG. 5, a radio resource control (RRC) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, a medium access control (MAC) layer, and a physical (PHY) Layers may be adaptively placed in a DU (eg, TRP 208) or a CU (eg, ANC 202).

3 illustrates an example physical architecture of a distributed radio access network (RAN) 300 in accordance with aspects of the present disclosure. The centralized core network unit (C-CU) 302 may host core network functions. The C-CU 302 may be centrally located. C-CU 302 functionality may be offloaded (eg, with Advanced Wireless Service (AWS)) in an effort to handle peak capacity.

The centralized RAN unit (C-RU) 304 may host one or more ANC functions. Optionally, C-RU 304 may locally host core network functionality. C-RU 304 may have a distributed arrangement. C-RU 304 may be close to the network edge.

DU 306 may host one or more TRPs (edge node (EN), edge unit (EU), radio head (RH), smart radio head (SRH), etc.). The DU may be located at the edges of the network with radio frequency (RF) functionality.

4 shows example components of BS 110 and UE 120 shown in FIG. 1, which may be used to implement aspects of the present disclosure. The BS may include a TRP or gNB.

According to an example, antennas 452, DEMOD / MOD 454, processors 466, 458, 464, and / or controller / processor 480 of UE 120 are described herein and FIGS. It may be used to perform the operations illustrated with reference to FIG. 12. According to one example, antennas 434, DEMOD / MOD 432, processors 430, 420, 438, and / or controller / processor 440 of BS 110 are described herein and FIGS. It may be used to perform the operations illustrated with reference to FIG. 12.

As an example, one or more of antennas 452, DEMOD / MOD 454, processors 466, 458, 464, and / or controller / processor 480 of UE 120 may perform UE beam-based tagging. May be configured to perform the operations described herein. Similarly, one or more of 434, DEMOD / MOD 432, processors 430, 420, 438, and / or controller / processor 440 of BS 110 are configured to perform the operations described herein. May be

At BS 110, transmit processor 420 may receive data from data source 412 and control information from controller / processor 440. The control information is for physical broadcast channel (PBCH), physical control format indicator channel (PCFICH), physical hybrid ARQ indicator channel (PHICH), physical downlink control channel (PDCCH), group common PDCCH (GC PDCCH), etc. It may be. The data may be for a physical downlink shared channel (PDSCH) or the like. Processor 420 may process (eg, encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively. The processor 420 may also generate reference symbols for, for example, the primary synchronization signal (PSS), the secondary synchronization signal (SSS), and the cell-specific reference signal (CRS). The transmit (TX) multiple-input multiple-output (MIMO) processor 430, if applicable, performs spatial processing (eg, precoding) on data symbols, control symbols, and / or reference symbols. May perform and provide output symbol streams to modulators (MODs) 432a through 432t. Each modulator 432 may process each output symbol stream (eg, for OFDM, etc.) to obtain an output sample stream. Each modulator may further process (eg, convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. Downlink signals from modulators 432a through 432t may be transmitted via antennas 434a through 434t, respectively.

At the UE 120, the antennas 452a through 452r may receive downlink signals from the base station 110 and provide the received signals to demodulators (DEMODs) 454a through 454r in the transceivers, respectively. You may. Each demodulator 454 may condition (eg, filter, amplify, downconvert, and digitize) an individual received signal to obtain input samples. Each demodulator may also process input samples (eg, for OFDM, etc.) to obtain received symbols. MIMO detector 456 may obtain symbols received from all demodulators 454a through 454r, perform MIMO detection on the received symbols, if applicable, and provide the detected symbols. Receive processor 458 processes (eg, demodulates, deinterleaves, and decodes) the detected symbols, provides decoded data for UE 120 to data sink 460, and provides decoded control information to the controller. / Processor 480 may be provided.

On the uplink, at the UE 120, the transmit processor 464 receives data (eg, for a physical uplink shared channel (PUSCH)) from the data source 462, and from the controller / processor 480 ( For example, it may receive and process control information (for a physical uplink control channel (PUCCH)). The transmit processor 464 may also generate reference symbols for the reference signal (eg, for a sounding reference signal (SRS)). The symbols from the transmit processor 464 are precoded by the TX MIMO processor 466 if applicable, and are also used by demodulators 454a through 454r in the transceivers (e.g., for SC-FDM, etc.). Is processed and transmitted to base station 110. At BS 110, uplink signals from UE 120 are received by antennas 434, processed by modulators 432, and detected by MIMO detector 436, if applicable, It may be further processed by the receive processor 438 to obtain decoded data and control information sent by the UE 120. Receive processor 438 may provide decoded data to data sink 439 and decoded control information to controller / processor 440.

Controllers / processors 440 and 480 may direct operation at base station 110 and UE 120, respectively. Other processors and modules at processor 440 and / or BS 110 may perform or direct execution of processes for the techniques described herein. The memories 442 and 482 may store data and program codes for the BS 110 and the UE 120, respectively. Scheduler 444 may schedule UEs for data transmission on the downlink and / or uplink.

5 shows a diagram 500 illustrating examples for implementing a communication protocol stack, in accordance with aspects of the present disclosure. The illustrated communication protocol stacks may be implemented by devices operating in a wireless communication system, such as a 5G system (eg, a system supporting uplink based mobility). 500 shows a radio resource control (RRC) layer 510, a packet data convergence protocol (PDCP) layer 515, a radio link control (RLC) layer 520, a medium access control (MAC) layer 525, And a communication protocol stack comprising a physical (PHY) layer 530. In various examples, the layers of the protocol stack are implemented as separate modules of software, portions of a processor or ASIC, portions of non-collocated devices connected by a communication link, or various combinations thereof. May be Co-located and non-co-located implementations can be used, for example, in a protocol stack for a network access device (eg, ANs, CUs, and / or DUs) or a UE.

The first option 505-a indicates that the implementation of the protocol stack includes a centralized network access device (eg, ANC 202 of FIG. 2) and a distributed network access device (eg, DU 208 of FIG. 2). Illustrating a split implementation of a protocol stack, splitting between)). For the first option 505-a, the RRC layer 510 and the PDCP layer 515 may be implemented by a central unit, and the RLC layer 520, the MAC layer 525, and the PHY layer 530. May be implemented by the DU. In various examples, CUs and DUs may be collocated or non-parallel. The first option 505-a may be useful in macro cell, micro cell, or pico cell deployment.

The second option 505-b shows an integrated implementation of the protocol stack in which the protocol stack is implemented in a single network access device. In a second option, the RRC layer 510, PDCP layer 515, RLC layer 520, MAC layer 525, and PHY layer 530 may each be implemented by an AN. The second option 505-b may be useful, for example, in femto cell deployment.

Regardless of whether the network access device implements part or all of the protocol stack, the UE is responsible for the entire protocol stack (eg, RRC layer 510, PDCP layer 515, RLC, as shown in 505-c). Layer 520, MAC layer 525, and PHY layer 530) may be implemented.

In LTE, the default transmission time interval (TTI) or packet duration is 1 ms subframe. In NR, the subframe is still 1 ms, but the base TTI is referred to as a slot. The subframe includes a variable number of slots (eg 1, 2, 4, 8, 16, ... slots) depending on the subcarrier spacing. NR RB is 12 consecutive frequency subcarriers. NR may support a default subcarrier spacing of 15 KHz, but other subcarrier spacings may be defined for the basic subcarrier spacing, for example, 30 kHz, 60 kHz, 120 kHz, 240 kHz, and the like. Symbol and slot lengths are scaled with the subcarrier spacing. CP length also depends on the subcarrier spacing.

6 is a diagram illustrating an example of a frame format 600 for NR. The transmission timeline for each of the downlink and uplink may be partitioned into units of radio frames. Each radio frame may have a predetermined duration (eg, 10 ms) and may be partitioned into 10 subframes, each 1 ms, with indices of 0-9. Each subframe may include a variable number of slots according to the subcarrier spacing. Each slot may include a variable number of symbol periods (eg, 7 or 14 symbols) depending on the subcarrier spacing. In the symbol period in each slot, indices may be assigned. Mini-slots are subslot structures (eg, 2, 3, or 4 symbols). Mini-slots, which may be referred to as sub-slot structures, refer to transmission time intervals having a duration of less than one slot (eg, 2, 3 or 4 symbols).

Each symbol in the slot may indicate a link direction (eg, DL, UL, or flexible) for data transmission, and the link direction for each subframe may be dynamically switched. The link direction may be based on the slot format. Each slot may include DL / UL data as well as DL / UL control information.

In NR, a synchronization signal (SS) block is transmitted. The SS block includes a PSS, SSS and two symbol PBCH. The SS block may be transmitted at a fixed slot location, such as symbol 0-3, as shown in FIG. PSS and SSS may be used by the UE for cell search and acquisition. The PSS may provide half frame timing, and the SS may provide CP length and frame timing. PSS and SSS may provide a cell identity. The PBCH carries some basic system information such as downlink system bandwidth, timing information in radio frames, SS burst set periodicity, system frame number, and the like. SS blocks may be organized into SS bursts to support beam sweeping. Additional system information such as RMSI (Remaining Minimum System Information), SIB (System Information Block), OSI (Other System Information) can be transmitted on the Physical Downlink Shared Channel (PDSCH) in a particular subframe.

In some situations, two or more dependent entities (eg, UEs) may communicate with each other using sidelink signals. Real-world applications of these sidelink communications include public safety, proximity services, UE-to-network relay, vehicle-to-vehicle (V2V) communications, Internet of Everything (IoE) communications, IoT communications, Mission-critical mesh, and / or various other suitable applications. In general, a sidelink signal may be used for one subordinate entity (eg, without relaying its communication via a scheduling entity (eg, UE or BS), although the scheduling entity may be utilized for scheduling and / or control purposes. For example, it may refer to a signal communicated from UE1 to another subordinate entity (eg UE2). In some examples, sidelink signals (unlike wireless local area networks that typically use unlicensed spectrum) may be communicated using the licensed spectrum.

The UE may be configured to transmit pilots using a dedicated set of resources (e.g., radio resource control (RRC) dedicated state, etc.) or configuration associated with transmitting pilots using a common set of resources (e.g., , RRC common state, etc.) may operate in various radio resource configurations. When operating in an RRC dedicated state, the UE may select a dedicated set of resources for transmitting a pilot signal to the network. When operating in an RRC common state, the UE may select a common set of resources for transmitting a pilot signal to the network. In either case, the pilot signal transmitted by the UE may be received by one or more network access devices, such as AN, or DU, or portions thereof. Each receiving network access device receives and measures pilot signals transmitted on a common set of resources, and also has a dedicated set of resources assigned to the UEs that the network access device is a member of the network access devices of the monitoring set for the UE. May be configured to receive and measure pilot signals transmitted on these devices. One or more of the receiving network access devices, or a CU to which the receiving network access device (s) transmit measurements of pilot signals, identifies the serving cells for the UEs or changes the serving cell for one or more of the UEs. Measurements may be used to initiate.

Example Beam Procedure

As mentioned above, in millimeter wave (mmW) cellular systems, beam forming may be necessary to overcome high path-losses. As described herein, beamforming may refer to establishing a link between a BS and a UE, where both of the devices form beams corresponding to each other. Both the BS and the UE find at least one suitable beam to form a communication link. The BS-beam and the UE-beam form what is known as the beam pair link (BPL). As an example, on the DL, the BS may use the transmit beam and the UE may use the receive beam corresponding to the BS transmit beam to receive the transmission. The combination of transmit beam and corresponding receive beam may be BPL.

As part of beam management, the beams used by the BS and the UE must be refined from time to time because they change channel conditions, for example due to the movement of the UE or other objects. In addition, the performance of the BPL may suffer fading due to Doppler spreading. Because of changes in channel conditions over time, the BPL may be updated or refined periodically. Accordingly, it may be beneficial if the BS and the UE monitor the beams and new BPLs.

At least one BPL must be established for network access. As mentioned above, new BPLs may need to be found later for other purposes. The network may decide to use different BPLs for different channels to communicate with other BSs (TRPs), or as a fall-back if an existing BPL fails.

The UE typically monitors the quality of the BPL, and the network may sometimes refine the BPL.

7 shows an example 700 for BPL discovery and refinement. In 5G-NR, P1, P2, and P3 procedures are used for BPL discovery and purification. The network uses the P1 procedure to enable the discovery of new BPLs. In the P1 procedure, as illustrated in FIG. 7, the TRP transmits different symbols of the reference signal, and each beam is formed in a different spatial direction to reach several (most, all) relevant places of the cell. In other words, the TRP transmits beams using different transmit beams over time in different directions.

For successful reception of at least one symbol of this "P1-signal", the UE must find an appropriate receive beam. It uses its available receive beams and searches for it by applying a different UE-beam during each generation of the periodic P1-signal.

Once the UE succeeds in receiving a symbol of the P1-signal, it finds BPL. The UE may not want to wait until the best UE receive beam is found because this may delay further actions. The UE may measure a reference signal receive power (RSRP) and report the symbol index to the BS along with the RSRP. Such a report will typically include the discovery of one or more BPLs.

In one example, the UE may determine a received signal with a high RSRP. The UE may not know which beam the BS used to transmit; However, the UE may report to the TRP the time at which it observed a signal with a high RSRP. The TRP may receive this report and may determine which TRP beam it used at any given time.

The TRP may then provide P2 and P3 procedures to purify the individual BPL. The P2 procedure purifies the TRP-beam of BPL. The TRP may transmit several symbols of the reference signal with different TRP-beams spatially close to the TRP-beam of the BPL (TRP performs a sweep using neighboring beams around the selected beam). At P2, the UE keeps its receive beam constant. Thus, the UE uses the same beam as in the BPL (as illustrated in the P2 procedure in FIG. 7). The TRP-beams used for P2 may differ from those used in P1 in that they may be spaced closer together or they are more focused. The UE may measure RSRP for various TRP-beams and indicate the best to the TRP.

The P3 procedure refines the UE-beam of BPL (see P3 procedure in FIG. 7). While the TRP-beam stays constant, the UE scans using other receive beams (the UE performs the sweep using neighboring beams). The UE may measure the RSRP of each beam and identify the best UE-beam. The UE may then use its best UE-beam for BPL and report the RSRP to the TRP.

Over time, the TRP and the UE establish several BPLs. When the TRP transmits a particular channel or signal, it lets the UE know which BPL will be involved so that the UE may adjust in the direction of the correct UE receive beam before the signal begins. In this way, every sample of that signal or channel may be received by the UE using the correct receive beam. In one example, the TRP may indicate for a scheduled signal (SRS, CSI-RS) or channel (PDSCH, PDCCH, PUSCH, PUCCH) which BPL is involved. In NR, this information is called a QCL indication.

If the characteristics of the channel on which the symbol on one antenna port is carried can be deduced from the channel on which the symbol on the other antenna port is carried, the two antenna ports are QCL. The QCL supports, at least, a beam janil function, a frequency / timing offset estimation function, and an RRM management function.

The TRP may use the BPL that the UE used to receive signals in the past. Both the transmit beam and the previously received signal for the signal to be transmitted point in the same direction or are QCL. The QCL indication may be needed by the UE (prior to the signal to be received) so that the UE may use the correct corresponding receive beam for each signal or channel. Some QCL indications may be needed from time to time when the BPL for a signal or channel changes, and some QCL indications are needed for each scheduled instance. The QCL indication may be transmitted in downlink control information (DCI), which may be part of the PDCCH channel. Since DCI is needed to control the information, it may be desirable that the number of bits needed to indicate the QCL is not too large. The QCL may be transmitted in a medium access control-control element (MAC-CE) or radio resource control (RRC) message.

According to one example, whenever a UE reports a BS beam that it has received with sufficient RSRP and the BS decides to use this BPL in the future, the BS assigns it a BPL tag. Thus, two BPLs with different BS beams may be associated with different BPL tags. BPLs based on the same BS beams may be associated with the same BPL tag. Thus, according to this example, the tag is a function of the BS beam of the BPL.

Example UE-Beam Based Tagging

According to aspects of the present disclosure, a QCL indication or tag that is a function of the UE-beam of the BPL is used. Thus, two BPLs with different BS-beams but with the same UE beam may be labeled by the same tag. The BS may maintain a table that contains a set of all BS-beams that are mapped to the same BPL tag (eg, mapped to the same UE-beam). Advantageously, these BS-beams provide flexibility to the BS. For example, for downlink transmission, the BS may switch between BS-beams associated with the same tag without having to signal a message to the UE. This allows very fast switching by the BS, which may be advantageous in scenarios of sudden beam failure, for example. In addition, for downlink communication, the BS may use BS-beams associated with the same tag for MIMO transmission with transmit diversity. According to an example, the BS may transmit signals simultaneously on multiple beams mapped to the same tag to achieve transmit diversity gain.

8-10 illustrating Tables 1-3 describe an example of UE-beam based tagging. The UE is configured to transmit reports regarding BS-beam measurements for reference signals used for the P1 procedure. The UE reports only the BS-beams it receives with a satisfactory RSRP (eg, RSRP> threshold, or configurable number of beams associated with the highest RSRP). Each reported item constitutes a BPL.

In principle, all reported BS-beams and corresponding UE-beams may be candidates for BPLs, but the BS may decide which beams to pursue in the future. The BS signals to the UE whether the reported items are new BPLs and which reported items are new BPLs (eg, 1 bit per new BPL). The BS may also signal tags of BPLs that it no longer wants to use. The UE may receive this report and determine whether each BPL has the same BPL and different UE-beams identified in the active pool. If the BPLs have the same UE-beam, the UE may use the same tag as the BPLs. BPLs with different UE-beams may use different tags.

Thereafter, and as described in more detail with reference to FIGS. 8-10, the UE signals the tags for the newly identified BPs to the BS. If two or more BPLs are best received by the same UE-beam, they may be labeled by the same tag. In this way, when a new BPL and an established BPL are associated with the same UE-beams, the new BPL is assigned the same tag of the established BPL.

8 illustrates an example 800 of BPL tags after discovery and deletion, in accordance with aspects of the present disclosure. As indicated at line 1, after discovery, the UE knows that it used UE-beam 2 to receive the signal. The UE may not know that the BS used BS-beam 1. The UE may report receiving the signal using UE-beam 2 at a particular time. Assuming that the BS is likely to consider this BPL, the UE may assign the BPL as tag 0. Next, as shown in line 2, after discovery, the UE knows that it used beam 4 to receive the signal at a particular time. The UE may not know that the BS used beam 3. If the BS is likely to consider this BPL, the UE may assign tag 1 to it. Since the UE beams are different in line 2 compared to line 1, the tags are different.

Next, as indicated at line 3, the UE may receive a signal using beam 2. The UE may send this information to the BS. Since UE beam 2 was also used to receive BS-beam 1 on line 1, the BS will tag line 3's BPL (5, 2) with tag 0 similarly to line 1 which also used UE-beam 2. . In this way, two BPLs with the same UE-beam are assigned the same tag.

At a later point in time, as indicated by line 4, the BS may determine that it may no longer wish to pursue BPL (3, 4). The BS may send a message to the UE to delete this tag. Accordingly, BPL (3, 4) may not be associated with tag 1. Assuming that tag 1 is not associated with another BPL, that tag is available for reuse with another BPL based on the UE-beam. Accordingly, tag 1 is available for BPL (8, 3) as shown in line 5.

According to aspects, it is possible to reduce the amount of signaling by instructing the UE to send a message only if either a new BPL and another new BPL or an established BPL share the same UE-beam. This may be possible because in all other cases each new BPL will be assigned a new tag. Both the BS and the UE know which tags are used to label the BPLs. There is a pool of unused tags, and the Airlink specification may outline in what order tags from the pool of unused tags are allocated to new BPLs. The BS may predict which tags the UE may assign to new BPLs, so there is no need for the UE to signal that information.

9 illustrates an example 900 of BPL tags after a P2 procedure, in accordance with aspects of the present disclosure. The DCI for the P2 procedure may include a tag of the BPL for which the BS-beam is to be refined. After the P2 sweep, the UE indicates the best BS-beam and associated RSRP. The procedure updates the BS-beam of the BPL while the UE-beam remains the same. The tags associated with the (updated) BPL remain the same. Table 2 shows an example. As shown in line 4, after P2 on BPL 3, 4, the UE may determine that the symbol transmitted on BS-beam 6 is a beam that is more quantitative than BS-beam 3. The new, improved BPL will be (6, 4). Note that the same UE beam is used for this BPL, so the tag (tag 1) remains the same despite the change in the BS-beam.

As indicated by line 5, after P2 on BPL (1, 2), the BS-beam may be updated from 1 to 7. You may receive an indication that the symbol transmitted on BS-beam 7 is better than BS beam 1. The BS may update the BS-beam associated with tag 0 to be BS-beam 7.

10 shows an example 1000 of BPL tags after a P3 procedure. The DCI for the P3 procedure will contain a tag of the BPL for which the UE-beam is to be refined. During the P3 sweep, the UE evaluates the performance of other UE-beams while the BS-beam remains constant. If the current UE-beam is still best, nothing changes. The UE does not need to signal anything to the BS.

However, if other UE-beams turn out to be better than current UE-beams, the two cases may be differentiated. In the first case, the UE associates a tag with only one BS-beam. In this case, the tag of the updated BPL may remain the same. The updated BPL consists of a new UE-beam and the current BS-beam. The UE may not need to signal anything to the BS, except perhaps the RSRP for the updated BPL.

In the second case, the UE associates the tag with more than one BS-beam. In this case, the updated BPL consists of the new UE-beam and BS-beam used for the P3 procedure. This BPL needs to be labeled with a new tag because it is now different from other BPLs consisting of one of the old UE-beams and the remaining BS-beams. The UE will report the new tag to the BS.

It is clear that the UE has no way of knowing whether the BS associates more than one BS-beam with the same BPL tag. Thus, a "new tag request bit" may be included in the DCI for the P3 procedure. It returns to the UE whether a new tag needs to be issued if the UE-beam needs to be updated. Table 3 shows an example.

As indicated at line 4, the BS may enable the P3 procedure on BPL (3, 4). The BS keeps beam 3 constant and the UE uses other beams around UE-beam 4. The UE determines that beam 5 is better than beam 4. The tag for the new BPL (3, 5) may still be the same since tag 1 was previously associated with a single BS-beam 3. Accordingly, the new tag request may be set to zero.

As indicated at line 5, the BS may enable the P3 procedure on BPL (1, 2). The UE may determine that UE-beam 3 is better than UE-beam 2. Accordingly, BPL (1, 2) may be replaced with BPL (1, 3). In response to the updated UE-beam, a new tag request may be set to one. This is because BPL (1, 2) and (BPL (5, 2) were previously associated with tag 0. In other words, since tag 0 is associated with two different BS-beams, the new tag request is 1 BPL (1, 2) is updated to BPL (1, 3) because of P3, and a new tag is needed so that each BPL tag is associated with the same UE-beam. 3) may be associated with tag 2.

11 illustrates example operations 1100 that may be performed by a UE, in accordance with aspects of the present disclosure. At 1102, the UE may receive an indication of a beam pair link (BPL), where the BPL includes a base station (BS) transmit beam and a corresponding UE receive beam. At 1104, the UE may tag the BPL based on the UE receive beam. At 1106, the UE may take one or more actions associated with the tagged BPL.

According to aspects, taking one or more actions includes sending an indication of the tagged BPL to the BS. Additionally or alternatively, according to aspects, taking one or more actions includes receiving signaling in accordance with the BPL.

Additionally or alternatively, taking one or more actions includes receiving a downlink transmission indicating beam refinement of the tagged BPL's BS transmit beam, eg, during a P2 procedure. During refinement, the UE may receive signaling transmitted from one or more neighboring beams of the BS transmit beam using a single UE receive beam, and the UE is associated with transmissions from one or more of the neighboring beams of the BS transmit beam. Signal quality may be determined and based on the determined signal quality, at least in part, the BS may indicate the recommended BS transmit beam corresponding to the UE receive beam of the tagged BPL.

Additionally or alternatively, taking one or more actions includes receiving a downlink transmission indicating beam refinement of a UE received beam of tagged BPL, such as during a P3 procedure. During refinement, the UE may receive signaling from the BS transmit beam via one or more receive beams neighboring the corresponding UE receive beam of the BPL, and may determine a signal quality associated with one or more of the neighboring beams of the UE receive beam. And update the UE receive beam corresponding to the BS transmit beam of the tagged BPL based at least in part on the determined signal quality. According to aspects, the UE may determine whether another tag is needed in response to the updated UE receive beam. If another tag is needed, the UE may calculate another tag, indicate that other tag to the BS, and assign that other tag to the updated UE receive beam and BS transmit beam. According to aspects, the other tag includes one of a new tag or a currently used tag.

According to aspects, taking one or more actions associated with a tagged BPL may transmit an indication of the tagged BPL to the BS in response to at least one of a new BPL or an established BPL that shares the same UE receive beam as the new BPL. It includes. Additionally or alternatively, taking one or more actions associated with a tagged BPL may include receiving a message from the BS to remove a tag for one or more BPLs and its current association, and in response to the message, Making the removed tag available for assignment to one or more new BPLs.

12 illustrates example operations 1200 that may be performed by a BS, in accordance with aspects of the present disclosure. At 1202, the BS may transmit an indication of a beam pair link (BPL), where the BPL includes a BS transmit beam and a corresponding user equipment (UE) receive beam. At 1204, the BS receives an indication of the tag assigned to the BPL based on the UE receive beam. At 1206, the BS takes one or more actions associated with the tagged BPL.

According to aspects, the BS receives an indication of a tagged BPL from the UE. According to aspects, taking one or more actions includes transmitting signaling in accordance with the BPL. According to aspects, the tag includes a beam indication.

According to aspects, taking one or more actions includes transmitting a downlink assignment that indicates beam refinement of a BS transmit beam of a tagged BPL, such as a P2 procedure. During purification, the BS may transmit signaling using one or more neighboring beams of the BS transmit beam, and the BS may receive a recommendation for an updated BS transmit beam corresponding to the UE receive beam of the tagged BPL. Where the updated BS transmit beam and the corresponding UE receive beam are assigned a tag.

According to aspects, taking one or more actions includes transmitting a downlink assignment indicating beam refinement of a UE received beam of a tagged BPL, such as a P3 procedure. During purification, the BS may transmit signaling using the BS transmit beam and receive an updated tag, which may be a new or old tag corresponding to the BS transmit beam of the tagged BPL. The updated UE receive beam and the corresponding BS transmit beam are assigned either a tag or an updated tag. According to aspects, the BS may transmit an indication for the updated tag in response to the updated UE receive beam, and receive the updated UE receive beam and the updated tag assigned to the BS transmit beam.

According to aspects, taking one or more actions associated with a tagged BPL includes receiving an indication of the tagged BPL in response to at least one of a new BPL or an established BPL that shares the same UE receive beam as the new BPL. do. According to aspects, taking one or more actions associated with a tagged BPL includes signaling to the UE a tag for one or more BPLs and its current association, wherein the removed tag is one or more new BPLs. Are available for future allocation to these fields.

FIG. 13 illustrates a communication device 1300 that may include various components (eg, corresponding to functional components) configured to perform operations on the techniques disclosed herein, such as the operations illustrated in FIG. 11. To illustrate. The communication device 1300 includes a processing system 1302 coupled to the transceiver 1310. The transceiver 1310 is configured to transmit and receive signals for the communication device 1300 via the antenna 1312, such as the various signals described herein. The processing system 1302 may be configured to perform processing functions for the communication device 1300, including processing signals received and / or transmitted by the communication device 1300.

Processing system 1302 includes a processor 1304 coupled to computer readable medium / memory 1306 via a bus 1308. In certain aspects, the computer readable medium / memory 1306, when executed by the processor 1304, causes the processor 1304 to perform the operations illustrated in FIG. 11, or the various techniques discussed herein. And store computer executable instructions for performing the operations.

In certain aspects, the processing system 1302 further includes a tagging component 1314 and a taking action component 1316 to perform the operations illustrated in FIG. 11. In certain aspects, the processing system 1302 may include one or more of a decision component, an indication component, an updating component, a component that makes the removed tag unavailable, and / or other components configured to perform the operations described herein. Include. The components 1314 and 1316 (and other non-exemplified components) may be coupled to the processor 1304 via the bus 1308. In certain aspects, components 1314 and 1316 (and other non-exemplified components) may be hardware circuits. In certain aspects, components 1314 and 1316 (and other non-exemplified components) may be software components that are executed and run on processor 1304.

FIG. 14 illustrates a communication device 1400 that may include various components (eg, corresponding to functional components) configured to perform operations on the techniques disclosed herein, such as the operations illustrated in FIG. 12. To illustrate. The communication device 1400 includes a processing system 1402 coupled to the transceiver 1410. The transceiver 1410 is configured to transmit and receive signals for the communication device 1400 via the antenna 1412, such as the various signals described herein. The processing system 1402 may be configured to perform processing functions for the communication device 1400, including processing signals received and / or transmitted by the communication device 1400.

Processing system 1402 includes a processor 1404 coupled to computer readable medium / memory 1406 via a bus 1408. In certain aspects, computer readable medium / memory 1406, when executed by processor 1404, causes processor 1404 to perform the operations illustrated in FIG. 12, or other techniques described herein. And store computer executable instructions for performing the operations.

In certain aspects, the processing system 1402 further includes an action component 1414 for performing the operations illustrated in FIG. 12. In certain aspects, processing system 1402 includes one or more of others (non-exemplified components) configured to perform the operations described herein. Component 1414 (and other non-exemplified components) may be coupled to processor 1404 via bus 1408. In certain aspects, component 1414 (and other non-exemplified components) may be hardware circuits. In certain aspects, component 1414 (and other non-exemplified components) may be software components that are executed and run on processor 1404.

The methods disclosed herein comprise one or more steps or actions for achieving the described method. Method steps and / or actions may be interchanged with one another without departing from the scope of the claims. That is, unless a specific order of steps or actions is specified, the order and / or use of specific steps and / or actions may be modified without departing from the scope of the claims.

As used herein, the phrase “at least one of” a list of items refers to any combination of such items, including single members. As one example, “at least one of a, b or c” covers a, b, c, ab, ac, bc and abc and any number of any combination of the same elements (eg aa, aaa, aab, aac, abb , acc, bb, bbb, bbc, cc, and ccc or any other ordering of a, b, and c).

As used herein, the term “determining” encompasses a wide variety of actions. For example, "determining" means computing, computing, processing, deriving, investigating, looking up (eg, looking up in a table, database, or other data structure). , Verification, and the like. In addition, “determining” may include receiving (eg, receiving information), accessing (eg, accessing data in memory), and the like. Also, "determining" may include resolving, selecting, selecting, establishing, and the like.

The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Accordingly, the claims are not intended to be limited to the various aspects shown herein, but are to be accorded the full scope consistent with the claims, and reference to singular elements is "one and only one" unless specifically stated otherwise. It is not intended to mean, but rather to mean "one or more". Unless expressly stated otherwise, the term “some” refers to one or more. All structural and functional equivalents to the elements of the various aspects that are known to those skilled in the art or described later throughout this disclosure are intended to be expressly incorporated herein by reference and to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. Unless an element is expressly stated explicitly using the phrase “means for” or in the case of a method claim, no claim element is used unless the element is referred to using the phrase “step”. It will not be interpreted under the provisions of § 112, paragraph 6.

Various operations of the methods described above may be performed by any suitable means capable of performing the corresponding functions. The means may include various hardware and / or software component (s) and / or module (s), including but not limited to circuits, application specific integrated circuits (ASICs), or processors. In general, where there are operations illustrated in the figures, they may have corresponding counterpart means-plus-functional components with similar numbering.

The various illustrative logic blocks, modules, and circuits described in connection with the present disclosure may be general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic. It may be implemented or performed in a device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

If implemented in hardware, an example hardware configuration may include a processing system in a wireless node. The processing system may be implemented with a bus architecture. The bus may include any number of interconnecting buses and bridges depending on the specific application of the processing system and the overall design constraints. The bus may link together various circuits including a processor, machine readable media, and a bus interface. The bus interface may, among other things, be used to connect a network adapter to a processing system via a bus. The network adapter may be used to implement signal processing functions of the PHY layer. In the case of the user terminal 120 (see FIG. 1); User interfaces (eg, keypads, displays, mice, joysticks, etc.) may also be connected to the bus. The bus may also link various other circuits such as timing sources, peripherals, voltage regulators, power management circuits, and the like, which are well known in the art and will not be described any further. The processor may be implemented with one or more general purpose and / or special-purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuitry capable of executing software. Those skilled in the art will recognize how best to implement the described functionality for the processing system depending on the specific application and the overall design constraints imposed on the overall system.

If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Software will be construed broadly to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or the like. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. The processor may be responsible for general processing, including managing the bus and executing software modules stored on machine readable storage media. The computer readable storage medium may be coupled to the processor such that the processor can read information from and write information to the storage medium. In the alternative, the storage medium may be integral to the processor. By way of example, machine readable media may include a transmission line, a carrier wave modulated by data, and / or a computer readable storage medium having instructions separate from the wireless node, all of which are connected to a processor via a bus interface. May be accessed. Alternatively or additionally, machine readable media or any portion thereof may be incorporated into the processor as in the case of cache and / or general register files. Examples of machine readable storage media include, for example, RAM (random access memory), flash memory, ROM (read only memory), PROM (programmable read only memory), EPROM (erasable programmable read only memory), EEPROM (Electrically erasable programmable read only memory), registers, magnetic disks, optical disks, hard drives, or any other suitable storage medium, or any combination thereof. Machine-readable media may be embodied in a computer program product.

A software module may include a single instruction or many instructions and may be distributed on several different code segments, between different programs, and across multiple storage media. Computer-readable media may comprise a number of software modules. Software modules, when executed by an apparatus such as a processor, include instructions that cause a processing system to perform various functions. The software modules may include a transmitting module and a receiving module. Each software module may reside in a single storage device or may be distributed across multiple storage devices. By way of example, a software module may be loaded from a hardware drive into RAM when a triggering event occurs. During execution of the software module, the processor may load some of the instructions into the cache to increase access speed. Next, one or more cache lines may be loaded into a general register file for execution by the processor. When referring to the functionality of a software module below, it will be understood that when executing instructions from the software module, such functionality is implemented by a processor.

In addition, any connection is properly termed a computer-readable medium. For example, the software may use websites such as coaxial cables, fiber optic cables, twisted pairs, digital subscriber lines ("DSL"), or wireless technologies such as infrared (IR), radio, and microwave, When transmitted from a server, or other remote source, its coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio waves, and microwaves are included within the definition of the medium. As used herein, discs and discs may be compact discs (CDs), laser discs, optical discs, digital versatile discs, DVDs, floppy discs ( floppy disks and Blu-ray® discs, where disks normally reproduce data magnetically, while discs optically reproduce data using a laser. Thus, in some aspects computer readable media may comprise non-transitory computer readable media (eg, tangible media). In addition, in other aspects computer readable media may comprise transitory computer readable media (eg, a signal). Combinations of the above should also be included within the scope of computer-readable media.

Thus, certain aspects may comprise a computer program product for performing the operations presented herein. For example, such a computer program product may include a computer readable medium having stored (and / or encoded) instructions, which instructions may be executable by one or more processors to perform the operations described herein. It may be. For example, instructions for performing the operations described herein and illustrated in the accompanying drawings.

In addition, it is recognized that modules and / or other suitable means for performing the methods and techniques described herein may be downloaded and / or otherwise obtained by a user terminal and / or a base station, where applicable. Should be. For example, such a device may be coupled to a server to enable the transfer of means for performing the methods described herein. Alternatively, the various methods described herein may be provided via a storage means (eg, a physical storage medium such as a RAM, ROM, compact disc (CD) or floppy disk, etc.), so that the storage means may be deviced. Upon coupling or providing, the user terminal and / or base station may obtain various methods. Moreover, any other suitable technique for providing the methods and techniques described herein may be used.

It is to be understood that the claims are not limited to the precise configuration and components illustrated above. Various modifications, changes and variations may be made in the arrangement, operation and details of the method and apparatus described above without departing from the scope of the claims.

Claims (30)

A method for wireless communication by a user equipment (UE), the method comprising:
Receiving an indication of a beam pair link (BPL), wherein the BPL comprises an indication of the beam pair link (BPL) comprising a base station (BS) transmit beam and a corresponding UE receive beam;
Tagging the BPL based on the UE received beam; And
Taking one or more actions associated with the tagged BPL. The method of claim 1,
Taking the one or more actions,
Transmitting the indication of the tagged BPL to the BS. The method of claim 1,
Taking the one or more actions,
Receiving signaling in accordance with the BPL. The method of claim 1,
Taking the one or more actions,
Receiving a downlink transmission indicative of beam refinement of the BS transmit beam of the tagged BPL;
During the refinement, using the UE receive beam, receiving signaling transmitted from one or more neighboring beams of the BS transmit beam;
Determining a signal quality associated with transmissions from one or more neighboring beams of the BS transmit beam; And
Indicating to the BS a recommended BS transmit beam corresponding to the UE receive beam of the tagged BPL based at least in part on the determined signal quality. The method of claim 1,
Taking the one or more actions,
Receiving a downlink transmission indicating beam refinement of the UE received beam of the tagged BPL;
During the refinement, receiving signaling from the BS transmit beam via one or more receive beams neighboring the corresponding UE receive beam of the BPL;
Determining a signal quality associated with one or more neighboring beams of the neighboring beams of the UE receive beam; And
Updating the UE receive beam corresponding to the BS transmit beam of the tagged BPL based at least in part on the determined signal quality. The method of claim 5, wherein
Determining whether another tag is needed in response to the updated UE received beam;
In response to determining that another tag is needed, calculating the other tag;
Displaying the other tag to the BS; And
Assigning the other tag to the updated UE receive beam and BS transmit beam. The method of claim 6,
Wherein the other tag comprises one of a new tag or a currently used tag. The method of claim 1,
Taking one or more actions associated with the tagged BPL may include:
And transmitting an indication of the tagged BPL to the BS in response to at least one of a new BPL or an established BPL that shares the same UE receive beam as the new BPL. The method of claim 1,
Taking one or more actions associated with the tagged BPL may include:
Receiving a message from the BS to remove a tag for one or more BPLs and its current association; And
In response to the message, making the removed tag available for allocation to one or more new BPLs. A method for wireless communication by a base station (BS),
Transmitting an indication of a beam pair link (BPL), wherein the BPL comprises an BS transmit beam and a corresponding user equipment (UE) receive beam;
Receiving an indication of a tag assigned to the BPL based on the UE receive beam; And
Taking one or more actions associated with the tagged BPL. The method of claim 10,
Receiving an indication of the tag,
Receiving from the UE an indication of the tagged BPL. The method of claim 10,
Taking the one or more actions,
Transmitting signaling in accordance with the BPL. The method of claim 12,
And the tag comprises a beam indication. The method of claim 10,
Taking the one or more actions,
Transmitting a downlink assignment indicative of beam refinement of the BS transmit beam of the tagged BPL;
During the refinement, transmitting signaling using one or more neighboring beams of the BS transmit beam; And
Receiving a recommendation for an updated BS transmit beam corresponding to the UE receive beam of the tagged BPL, wherein the updated BS transmit beam and the corresponding UE receive beam are assigned the tag. And a method for wireless communication by a base station. The method of claim 10,
Taking the one or more actions,
Transmitting a downlink assignment indicative of beam refinement of the UE received beam of the tagged BPL;
During the refinement, transmitting signaling using the BS transmit beam; And
Receiving an updated tag, which may be a new or old tag corresponding to the BS transmit beam of the tagged BPL, wherein the updated UE receive beam and the corresponding BS transmit beam are one of the tag or the updated tag Receiving the updated tag, the method for wireless communication by a base station. The method of claim 15,
Transmitting an indication for the updated tag in response to the updated UE received beam; And
Receiving the updated tag assigned to the updated UE receive beam and BS transmit beam. The method of claim 10,
Taking one or more actions associated with the tagged BPL may include:
Receiving an indication of the tagged BPL in response to at least one of a new BPL or an established BPL that shares the same UE receive beam as the new BPL. The method of claim 10,
Taking one or more actions associated with the tagged BPL may include:
Signaling to the UE the removal of a tag for one or more BPLs and their current association, wherein the removed tag is available for future allocation to one or more new BPLs; , Method for wireless communication by a base station. An apparatus for wireless communication by a user equipment (UE),
Receiving an indication of a beam pair link (BPL), wherein the BPL comprises means for receiving an indication of the beam pair link (BPL) comprising a base station (BS) transmit beam and a corresponding UE receive beam;
Means for tagging the BPL based on the UE receive beam; And
Means for taking one or more actions associated with the tagged BPL. The method of claim 19,
Means for taking the one or more actions include:
Means for transmitting an indication of the tagged BPL to the BS. The method of claim 19,
Means for taking the one or more actions include:
Means for receiving signaling in accordance with the BPL. The method of claim 19,
Means for taking the one or more actions include:
Means for receiving a downlink transmission indicative of beam refinement of the BS transmit beam of the tagged BPL;
Means for receiving signaling transmitted from one or more neighboring beams of the BS transmit beam during the refinement, using the UE receive beam;
Means for determining signal quality associated with transmissions from one or more neighboring beams of the BS transmit beam; And
Means for indicating to the BS a recommended BS transmit beam corresponding to the UE receive beam of the tagged BPL based at least in part on the determined signal quality. The method of claim 22,
Means for taking the one or more actions include:
Means for receiving a downlink transmission indicative of beam refinement of the UE received beam of the tagged BPL;
Means for receiving signaling from the BS transmit beam via one or more receive beams neighboring the corresponding UE receive beam of the BPL during the refinement;
Means for determining a signal quality associated with one or more neighboring beams of the neighboring beams of the UE receive beam; And
Means for updating the UE receive beam corresponding to the BS transmit beam of the tagged BPL based at least in part on the determined signal quality. The method of claim 23, wherein
Means for determining whether another tag is needed in response to the updated UE received beam;
Means for calculating the other tag in response to determining that another tag is needed;
Means for displaying the other tag to the BS; And
Means for assigning the other tag to the updated UE receive beam and BS transmit beam. The method of claim 24,
And the other tag comprises one of a new tag or a currently used tag. An apparatus for wireless communication by a base station (BS),
Means for transmitting an indication of a beam pair link (BPL), the BPL comprising means for transmitting an indication of the beam pair link (BPL), the BS transmitting beam and a corresponding user equipment (UE) receiving beam;
Means for receiving an indication of a tag assigned to the BPL based on the UE receive beam; And
Means for taking one or more actions associated with the tagged BPL. The method of claim 26,
Means for taking the one or more actions include:
Means for transmitting a downlink assignment indicating beam refinement of the BS transmit beam of the tagged BPL;
Means for transmitting signaling during the refinement using one or more neighboring beams of the BS transmit beam; And
Means for receiving a recommendation for an updated BS transmit beam corresponding to the UE receive beam of the tagged BPL, wherein the updated BS transmit beam and the corresponding UE receive beam are assigned the tag. Means for wireless communication by a base station. The method of claim 26,
Means for taking the one or more actions include:
Means for transmitting a downlink assignment that indicates beam refinement of the UE received beam of the tagged BPL;
Means for transmitting signaling using the BS transmit beam during the refinement; And
Means for receiving an updated tag that may be a new or old tag corresponding to the BS transmit beam of the tagged BPL, wherein the updated UE receive beam and the corresponding BS transmit beam are one of the tag or the updated tag. Means for receiving the updated tag, the apparatus for wireless communication by a base station. The method of claim 28,
Means for transmitting an indication for the updated tag in response to the updated UE received beam; And
Means for receiving the updated tag assigned to the updated UE receive beam and BS transmit beam. The method of claim 26,
Means for taking one or more actions associated with the tagged BPL,
Means for signaling a removal of a tag for one or more BPLs and its current association to the UE, wherein the removed tag includes the means for signaling that is available for future assignment to one or more new BPLs , Apparatus for wireless communication by a base station.

Images